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Weather & Climate
Dayton, Washington, United States
Overview
Climate data and monthly weather averages for Dayton.
Key Metrics
Annual Avg
10.7°C
Summer Avg
21.5°C
Winter Avg
0.9°C
Record High
40.7°C
Record Low
-23.3°C
Annual Precipitation
486.1 mm
Avg Humidity
64%
Summer Humidity
47%
Winter Humidity
81%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 14.7° | 0.6° | -23.3° | 62.3 | 84% | 40 | 57.2 |
| Feb | 17.2° | 2° | -17.1° | 45.1 | 78% | 62 | 59.6 |
| Mar | 22.7° | 5.7° | -11.1° | 58.9 | 72% | 102 | 48.3 |
| Apr | 28.2° | 9° | -3.7° | 42.3 | 66% | 144 | 50.8 |
| May | 34.2° | 14.2° | -0.7° | 42.8 | 61% | 187 | 52.4 |
| Jun | 40.1° | 18.1° | 3.9° | 31.8 | 55% | 203 | 45.5 |
| Jul | 40° | 23.5° | 8.4° | 7.8 | 44% | 233 | 41.9 |
| Aug | 40.7° | 22.8° | 7.3° | 11.2 | 42% | 192 | 45.1 |
| Sep | 38.4° | 17.7° | -0.1° | 16.5 | 48% | 136 | 50.1 |
| Oct | 29.8° | 10.6° | -7.5° | 39.7 | 61% | 87 | 53.1 |
| Nov | 20.3° | 4.4° | -13.7° | 57.3 | 74% | 44 | 66.9 |
| Dec | 15.8° | 0.2° | -20.5° | 70.4 | 82% | 31 | 62.4 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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